Blindstitch sewing-machine.



W. E. BAILEY.

BLINDSTITCH SEWING MACHINE.

APPLICATION FILED NOV. 5. 1909.

Patented Apr. 25, 1916.

i 2 SHEETS-SHEET 1.

W. E. BAILEY.

BLINDSTITCH SEWING MACHINE..

APPLICATION FILED NOV-5, 1909.

Patented Apr. 25, 1916. F2 2 SHEETS-SHEET 2.

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WILLIAM E. BAILEY, OF BEVERLY, MASSACHUSETTS, ASSIGNOR TO ARZBE'ITEIR. FELIiING MACHINE COMPANY, 015 BOSTON, MASSACHUSETTS, A CORPORATION OF MAINE.

BLINDSTI'ICH SEWING-MACHINE.

i Specification of Letters Patent.

Patented Apr. 25, 1916.

To (1Z7 whom it may concern Be it known that I, VILLni-tt E. BAILEY, a citizen of the United States, residing at Beverly, in the county of Essex and State of Massachusetts, have invented an Improvement in Blindstitch Sewing-"liachmes, of which the following description, in connection with the accompanying drawing, 1s a specification. like letters on the drawlng representing like parts.

This invention relates to a sewing machine for felling with blind stitches and is an improvement in the Arbetter type of blindstitching machine.

The invention relates particularly to an improved means for presenting the work to the stitch-forming mechanism.

The stitch-forming mechanism and the main portion of the machine is of the construction hitherto employed in the Arbetter type of blindstitch sewing machine, but the feeding mechanism proper is of the type which operates entirely upon the upper surface of the goods. v

\Vhile the machine of this invention is useful for felling a variety of work, it is particularly designed for use in connection with work having inequalities, such as cross seams, which must pass between the instruinentalities acting upon the upper and lower surfaces of the work in the vicinity of the stitching point, and in which the felling is performed over such irregularities.

The invention provides in connection with an upper stationary presser foot and an upper feed mechanism a vertically yielding work-support and an independently mounted vertically-yielding lower presser, the latter of which maintains the work in engagement with the upper presser and feed, and the former of which supports the work in the vicinity of the stitching point and enables the work to be properly handled.

The invention also involves the additional feature of a pivoted plate forming the upper surface of the lower presser, and so constructed that the usual bender employed in this type of machine has its movement through an opening in said pivoted. plate in line with the pivotal axis thereof. This construction enables the work at all times to be held firmly between the lower presser and the upper presser and feed at the point of entrance of the needle into the fabric, notwithstanding the passage of irregularities, such as cross seams, therebetween, so that the felling stitches may have the same relation to the felled edge of the work at the points where these irregularities occur, as well as at other points.

The invention will more fully appear from the accompanying description and drawings and will be particularly pointed out in the claims.

The drawings represent so much of a blindstitch felling machine as is necessary fully to disclose the said invention.

In the drawings, Figure 1 is a front end elevation of the lower portion of the machine. Fig. 2 is a front elevation in detail of the upper end of the bender and of the lower presser showing the pivoted plate form. Fig. 3 is a plan View of the construction shown in Fig. 2. Fig. 4 isa side elevation of the parts shown in Fig. 1, Fig. 5 is a top plan of the lower presser shown in: Figs. 1 and The stitch-formingmechanism and correlated parts, the bender mechanism and the general arrangement of the machine, except for the feeding mechanism and work-supporting devices, are constructed substantially the same as in the machine illustrated and described in the Arbetter Patent No. 1,152,871 granted September 7, 1915, and the feeding mechanism herein partially illustrated is substantially the same as that illustrated in the patent to Bailey, No. 1,091,619 granted March 31, 1914, and it will-be unnecessary, therefore, to enter into any detailed description of the machine as to these features.

The lower portion of the overhanging arm of the machine is indicated at A. The presser-foot D is stationary and is mounted in the overhanging arm. At its lower heel portion it is constructed to present a guide D for the edge of the superimposed layer or layers of fabric, and at its toe portion it is provided with the usual guard-plate D The portion of the presser foot riding over the superimposed layer or layers of fabric presents the usual beveled extension I) to guide the fabric therebeneath.

The stitch-forming mechanism, of the usual Arbetter type, is represented in Fig. 1 and comprises the curved reciprocating needle .and the cooperating rotary hook. The curved needle is shown at a mounted in a needle-carrier b mounted on the shaft 15 and oscillated by means of a link B connected to a crank arm. The shaft B is sup- I.

ported in the bearing in the vertical rockershaft B The needle is thus given its reciprocations in diverging planes to make the felling stitch. The compleimantal stitchforming mechanism is shown as a rotary hook and inclosed bobbin case I carried by the support A depending from the overhanging arm A.

The feeding mechanism is mounted and operates entirely above the work and acts therefore solely upon the-upper surface ofthe work. It comprises a suitably constructed feed dog E'and means for giving it an up-and-dow-n and a forward and backward movement. In the form illustrated. a member E? is mounted to slide vertically in the arm A, and this sliding member E carries an elongated transverse bearing E in which is fulcrumed a bell-crank lever E one end of which carries the feed dog and the other end of which is operated by a suitable con-- nection with the driving mechanism.

The work table of the'machine is indicated at E and is apertured beneath the stitchforming and feeding mechanism to provide for the work-support E and the lower presser'E The work-support E supports the body of the work adjacent to and beneath the stitch-forming and feeding mechanisms so as to maintain it in proper position, but the immediate portion acted upon by the feed and the needle is directly supported by the lower'presscr E These elements are limited in their upper positions, the former by a stop E and the latter by contact with the work against the stationary presser-foot D, so that all irregularities, such as cross seams, may readily pass over the worksupport E beneath the parts carried by the over-hanging arm, and still present the work in proper relation to the stitching and feeding instrumentalities, while the lower presser E directly supports and handles the work at the stitching point. The bender L, by means of which in this type of machine the main or base layer of fabric is projected into the path of the needle, passes up through an aperture in the lower presser E. It operates upon each movement of the needle for forming the stitch in the single or base layer to project the material into the path of the needle. This bender L is carried by a bender-support L mounted to slide vertically in bearings L in the face plate E? which is fastened to the work support stand by suitable screws E The bender is given its vertical movement by means of a stud L acting between projections on the bender-support and carried by a rocker-arm L mounted on the rock shaft L, which is provided at its opposite end with the arm L acting against the cam L carried by the bender-shaft L. The work support E is carried by the vertically movable work support stand E, and this stand is retained in the vertical ways in which it slides by means of a face plate E The work support IS with its supporting stand 10 is normally held in elevated position by the spring it, and it is depressed by the engagenwnt of a suitable lever (not shown) with the stud 15*.

a The lower presser E is clamped by a set screw E to its supporting post It. The post E is mounted to slide vertically in bearings formed in the face plate. E. A screw lY- secures a collar 15 to the post E and this collar serves as an abutment for the coil spring 15 surrounding the post. The lower end of the spring abuts against the vertically adjustable bushing 15" by means of which the tension of the spring may be varied and the consequent upward pressure of the lower presser E adjusted. The stud E on the collar E extends into a slot E in the work support stand, and prevents rotation of the post E. A stud 1C projects outwardly from the work support stand in the path of the stud E and is so arranged that upon the depression of the work support to a predetermined extent, it will ongage the stud E and then upon further depression of the work support, the lower presser will likewise be depressed.

The lower presser, shown in Figs. 1, 4 and 5, is provided with a suitable aperture T for the passage of the bender L, and is cut away at T to relieve the friction on the material as it passes to the stitch-forming mechanism. The construction of the lower presser, illustrated in Figs. 2 and 3, is however the preferred form, and enables the work at all times to be held firmly between the lower presser and the upper presser and feed at the stitch-forming point, allowing the passage of all irregularities, such as cross seams, therebetween, without effecting the successful formation of the stitches. In this form the lower presser. comprises a base plate I )rovided with a socket secured to the post id by the set screw 11 Upon this face plate is pivotally mounted the presser plate R Both the face and presser plate are apertured at R to permit the passage of the bender and the pivots R upon which the pivoted presser plate swings are arranged to have their axes intersect the vertical axis of the bender. The pivoted presser plate is beveled or sloped away in both directions in the line of feed from the pivotal point so that normally the areav of the material clamped between the lower presser and the upper presser and feed is just sufiicient to secure the proper results. Any irregularity, such as a cross scam in the material, as it approaches and passes the stitching point will cause the pivoted presser plate to rock upon its pivot and thus preserve the proper relation between the material and the stitchforming mechanism to insure the proper positioning of the stitches in the material during the passage of the irregularity in the material. I

In both forms of lower pressers the work is maintained in engagement with the upper presser and feed by the vertically yielding lower presser at and adjacent to the stitching point while the body of the work is supported by the yielding work support immediately surrormding the lower presser without being forced into contact with the upper prcsscr and feed. Thus the work is easily handled and its ready presentation to the stitch-forming mechanism at all times is secured.

.[laving fully described my invention, what I claim as new and desire to secure by Letters Patent is:-

1. A blind stitch sewing machine, comprising in cmnbiimtion, feeding mechanism, a stationary presser foot, a vertically movable work support, a vertically yielding lower presser, independent of said feeding mechanism and connections between the work support and the lower prcsser allowing llltlt'l')(?l1(l(l1tupward movement of each but causing the depression of the lower presser upon the depression of the work support be yoad a predetermined distance.

2. A blind stitch sewing machine, comprising in combination, feeding mechanism, a stationary presser foot, a vertically movable work support, a. vertically yielding lower presser independent of said feeding mechanism but cooperating therewith, a stop for limiting upward movement of said work support, and connections between the work support and the lower prcsser allowing in dependent upward movement of each but causing the depression of the lower presser upon the depression of the work support beyond a predetermined distance.

I). A blind stitch sewing machine, comprising in' combination, a. stationary presser fact. a vertically movable work support, a vertically yielding lower presser mounted independently of the said work support, and connections between the work support and the lower presser allowing independent upward movement of each but causing the depression of the lower presser upon the depression of the work support beyond a, predetermined distance.

t. A blind stitch sewing machine, comprising in combination, a stationary presser foot. a vertically movable work support, a vertically yielding, movable lower presser, a presser plate pivotally mounted upon said lower presser. stitch forming mechanism mounted and operating above the work sup port. and acting to form stitches in the material above the pivotal axis of said plate.

5. A blind stitch sewing machine, comprising in combination, a stationary presser ioot. a vertically movable work support, a vertically yielding, movable lower presser. a presser plate. pivotally mounted upon said lower prcsscr, stitch forming mechanism mounted and operating above the work support, a vertically movable bender. and means for moving'the bender in the path transversely of the pivotal axis of: said presscr plate.

(3. A blind stitch sewing machine, comprising in coml'iination, feeding mechanism, a stationary presscr foot, a vertically movable work support, a vertically yielding lower presser independent of said feeding mechanism but cooperating therewith, connections between the work support and the lower presser allowing independent up and movement of each but causing the depression of the lower presser upon the depression of the work support beyond a predetermined distance, a stop for limiting the upward movement of the work support, stitch forming mechanism mounted and operating above the work support and co-acting with the lower presser.

7. A blind stitch machine comprising a curved oscillating needle and complemental stitch forming mechanism and feeding mechanism mounted and operating above the work support. a vertically movable work support, a vertically yielding lower presscr. connections between the work support and the lower presser allowing independent upward movement of each but causing the depression of the lower presser upon the depression of the work support beyond a predetermined distance.

8. A blind stitch sewing machine, comprising in combination. a stationary presser toot. a vertically movable work support, a vertically yielding lower presser. connections between the work support and the lower presser allowing independent upward movcment of each but causing the depression of the lower prcsser upon the depression of the work support beyond a predetermined distance, a stop for limiting upward move ment of the work support, stitch-forming mechanism mounted and operating above the work support, a presser plate pivotally mounted upon the lower presser, and feeding mechanism mounted and operating above said pivoted plate and eo-acting therewith.

in testimony whereof. I have signed my name to this specification, in the presence of two subscribing witnesses.

VILLIAM E. B ATLEY.

\Yi tnesses I EMILY C. l-looens, Fin-linemen S. t-innnxLi-LAF. 

